I am puzzled by something about ArcMap's export to PDF. I have a large contours layer being used on a map, much larger than the area shown in my neatline. When I export to PDF I get a huge file size (24mb) but if I turn off the contours layer it goes way down (300k). If I make a clip of the contours and use that the file size stays small.
In my export settings I am not exporting any Layers or Attributes (under the Advanced tab) so I would have thought that the PDF would be a "flat" file where the map is rendered onto the page, and the data would stop at the page's borders since there's no layer/attribute info that has to be embedded, and none of the spatial linework is useful when it is not on the rendered page.
So is there a setting somewhere in ArcMap that allows the export to clip spatial data to the export page extent to decrease file size, instead of including all linework for features that are not even visible? (what i assume is happening)